I too started with a Delos but my dealer allowed me to upgrade to the Kleos and after about 4 weeks with the Delos it was a superb performer but the Kleos is better. I feel that extracts more information to the extent that I have been amazed at how much information is contained in those grooves. But once it is extracted with archeilogical precison it then converts it to music in the most natural tonality I could hope for. The differnce between the two is quite large in that they both are wonderful cartridges and the Delos is a destination in it's self, the Kleos is just a much more musical and enjoyable journey. I look back as I spent money I really couldn't or shouldn't have invested at the time for economic reasons, but now about 8 months later, I can only say it was worth it.